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Taxes | 6 Months Ended
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Jul. 01, 2018
Income Tax Disclosure [Abstract] |
Taxes | Taxes A reconciliation of the United States federal statutory corporate tax rate to the Company’s income tax expense, or effective tax rate, was as follows:
| Three-months Ended |  | Six-months Ended
| July 1, 2018 |  | July 2, 2017 |  | July 1, 2018 |  | July 2, 2017
Income tax provision at federal statutory corporate tax rate | 21 | % |  | 35 | % |  | 21 | % |  | 35 | %
State income taxes, net of federal benefit | 2 | % |  | 1 | % |  | 2 | % |  | 1 | %
Foreign tax rate differential | (7 | )% |  | (18 | )% |  | (7 | )% |  | (18 | )%
Tax credit | (1 | )% |  | (1 | )% |  | (1 | )% |  | (1 | )%
Discrete tax benefit related to stock option exercises | (1 | )% |  | (9 | )% |  | (5 | )% |  | (19 | )%
Other | 2 | % |  | 1 | % |  | 1 | % |  | 1 | %
Income tax provision | 16 | % |  | 9 | % |  | 11 | % |  | (1 | )%
On December 22, 2017, the United States Congress passed and the President signed into law the Tax Act. The Tax Act included a decrease in the U.S. federal statutory corporate tax rate from 35% to 21%, a one-time transition tax on unrepatriated foreign earnings, and limits on certain deductions. The Company made what it considers to be a reasonable estimate of the impact of the Tax Act in its financial statements for the year ended December 31, 2017. The Company has not recorded any changes to this estimate for the three-month and six-month periods ended July 1, 2018. The Securities and Exchange Commission (SEC) released Staff Accounting Bulletin (SAB) No. 118 to provide guidance to companies on how to implement the accounting and disclosure changes as a result of the Tax Act. The SEC staff guidance has recognized that, due to the complexity and timing of the release of the Tax Act, the accounting for this change in the law may be incomplete upon issuance of a company's financial statements. This significant estimate is highly judgmental and changes to this estimate could result in material charges or credits in future reporting periods. U.S. Treasury regulations and administrative guidance have not been finalized as of the date of these financial statements. The issuance of final regulations may require the Company to revise its estimates of earnings and profits, as well as certain deferred taxes as required. The Tax Act subjects the Company to current tax on Global Intangible Low-Taxed Income (GILTI) earned by certain foreign subsidiaries. The Company can make an accounting policy election to either recognize deferred taxes for temporary differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI resulting from those items in the year the tax is incurred. As of the date of this report, the Company is still evaluating the guidance and has not made a policy election related to the treatment of the GILTI tax. The Company will continue to gather and analyze information on historical unrepatriated foreign earnings and to monitor state laws relating to this income to finalize both the federal and state tax impact. The majority of income earned outside of the United States is permanently reinvested to provide funds for international expansion. The Company is tax resident in numerous jurisdictions around the world and has identified its major jurisdictions as the United States, Ireland, and China. The statutory tax rate is 12.5% in Ireland and 25% in China, compared to the U.S. federal statutory corporate tax rate of 21%. International rights to certain of the Company's intellectual property are held by a subsidiary whose legal jurisdiction does not tax this income, resulting in a foreign effective tax rate that is lower than the above mentioned statutory rates, although the reduced taxes overseas have been partially offset by changes in U.S. tax law. These differences resulted in a decrease in the effective tax rate by 7 percentage points for the three-month and six-month periods ended July 1, 2018, and a decrease in the effective tax rate by 18 percentage points for the three-month and six-month periods ended July 2, 2017. The excess tax benefit arising from the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes from stock option exercises resulted in a decrease of the effective tax rate by 1 and 9 percentage points for the three-month periods ended July 1, 2018 and July 2, 2017, respectively, and a decrease of the effective tax rate by 5 and 19 percentage points for the six-month periods ended July 1, 2018 and July 2, 2017, respectively. On January 1, 2018, the Company adopted Accounting Standard Update (ASU) 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other than Inventory." This Update requires the recognition of deferred income taxes for an intra-entity transfer of an asset other than inventory. As a result of this ASU, the Company recorded $5,961,000 through a cumulative-effect adjustment directly to retained earnings at the beginning of fiscal year 2018. During the six-month period ended July 1, 2018, the Company recorded a $879,000 increase in reserves for income taxes, net of deferred tax benefit. Estimated interest and penalties included in these amounts totaled $136,000 for the six-month period ended July 1, 2018. The Company’s reserve for income taxes, including gross interest and penalties, was $8,427,000 as of July 1, 2018, which included $7,399,000 classified as a non-current liability and $1,028,000 recorded as a reduction to non-current deferred tax assets. The amount of gross interest and penalties included in these balances was $924,000. If the Company’s tax positions were sustained or the statutes of limitations related to certain positions expired, these reserves would be released and income tax expense would be reduced in a future period. As a result of the expiration of certain statutes of limitations, there is a potential that a portion of these reserves could be released, which would decrease income tax expense by approximately $1,100,000 to $1,200,000 over the next twelve months. The Company has defined its major tax jurisdictions as the United States, Ireland, and China, and within the United States, Massachusetts. Within the United States, the tax years 2014 through 2017 remain open to examination by the Internal Revenue Service and various state tax authorities. The tax years 2013 through 2017 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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